Comparative Characteristics Of The Results Of Implantation Of Multifocal (Diffraction) And Gradient (Refraction) Intraocular Lenses

The comparison of uncorrected visual acuity and the presence of dysphotopsia in patients after cataract phacoemulsification and implantation of multifocal artificial lenses (diffractive IOLs) and lenses with an enhanced depth of focus (refractive IOLs).

The work was performed on the basis of the Department of Ophthalmology of the Dnipro State Medical University and the Eye Microsurgery Department of the Dnipropetrovsk Regional Clinical Ophthalmological Hospital.

We examined 4 groups of patients who underwent cataract phacoemulsification surgery with IOL implantation: group I - 41 patients (72 eyes) with Bi-Flex Elon 877 PEY IOLs, and three groups of 15 patients (90 eyes) in each of IOLs AcrySof PANOPTIX (group II), AT Lisa 839M (group III), Bi-Flex-M 677MY (group IV). Uncorrected visual acuity at distances of 5 m, 0.7 m, and 0.4 m was checked. The presence of dysphotopsias was assessed by the number of points (4-point scale, less is better) according to the modified Quality of Vision questionnaire. The medians of important indicators were compared, and the Wilcoxon and Kruskel-Wallis tests were used to assess the reliability of the difference between the medians between the groups.

The visual acuity at a distance of 5 m was 1.0 in patients in all 4 groups. At a distance of 0.7 m - 0.7 in group I and II, 0.75 in group III and group IV. At a distance of 0.4 m, visual acuity was 0.7 in group I, 0.85 in groups II and III, 0.9 in group IV.

Analysis of dysphotopsias: the average number of points regarding the presence of glare in group I was 0.53: 0.64 in group II, in group III – 0.57, in group IV – 0.36, in the presence of halos – 0.46, 1, 17, 1.3 and 0.92, respectively. Lightning score was 0.43 in group I, 0.14 in group II, 0.19 in group III, 0.08 in group IV.

The ELON lens with enhanced depth of focus provides as good distance and intermediate vision as multifocal diffractive comparators, and close vision is even better than expected. Considering comparable to multifocal artificial lenses visual acuity at long and medium distance, less pronounced dysphotopsia, the best social accessibility is considered to be non-diffractive IOL ELON is a worthy alternative to multifocal diffractive IOLs when planning the tactics of cataract surgery.